My macaw regurgitates after pulling blankets. Is she nesting or sick?

If Rio has been vomiting for a week straight, or you suspect she ate part of a foreign item, those are both very concerning signs. I would seek veterinary care ASAP to rule out any issues such as a foreign body from eating parts of her bed, illness causing GI upset, parasites, infections, etc. It could also be that she is regurgitating as a sign she wants to mate, especially if it is only in one specific area/on her nest. Removing the bed may help resolve this issue some. It is also a good idea to remove the bedding if she is attempting to eat it, and to remove any extra treats or food other than her regular diet to see if that helps improve her symptoms- however, if they continue, seeking veterinary care is needed.

Birds can sometimes regurgitate as a sign of affection/interest in trying to mate with you, so this could be that Bella is very comfortable and bonded with you. If she is otherwise healthy, I wouldn't be too concerned, but you may want to try to discourage the behavior by changing your interactions some if she seems too attached. If you suspect she may be ill instead, a vet visit is best.

Regurgitating is normal in certain situations as is molting. Monitor for lethargy, decreased appetite, loose droppings, excessive scratching or feather plucking. See your veterinarian or an experienced avian vet for an exam if necessary.

Regurgitation can be a sign of affection/wanting to mate, and some birds may display this behavior toward people they are bonded with if they do not have a mate. It is best to discourage the behavior by either stopping interactions when it happens, or distracting with a favorite toy or treat instead. Puzzle toys or things that can be chewed on/groomed may help him get out some boredom or affection for the object instead.

Birds can sometimes begin to regurgitate or share food if they're feeling in a "lovey" or mating mood. It may be that he is considering you a potential mate. It'd be best not to encourage the behavior if this is the case, and to try and interact with him in other ways, such as offering a toy to play with, walking away when he attempts it etc. If you're seeing any other symptoms such as changes in eating habits, stool changes, listless behavior, etc, then it could indicate something beyond just behavioral, and scheduling a vet checkup is always a good idea.

This does not sound as if this is a "happy" behavior, but sexually mature birds will sometimes regurgitate to mates. Most conures become sexually mature after 1-2 years of age, at the earliest. Other reason for head bobbing and regurgitation behavior is illness or a foreign body in the crop. If Opal continues to regurgitate, you should seek out an avian veterinarian for an examination. If it only happens when you pet the neck, try not touching the area for a few days to see if the regurgitation behavior subsides.

Often they regurgitate (not vomit) their food when they are in the presence of a friend or mate. It's a way for them to show off. If you have a particularly close relationship with your parrot, then this could explain the behavior; especially if it's something he does regularly. They can also do it more often during breeding seasons. There are a couple of different diseases of the gastrointestinal tract that can also cause frequent regurgitation, so it's best to have him checked out by an avian vet if this suddenly started occurring. If you are suspicious that it's more behavioral, then you may consider altering how you interact with your parrot. This is especially important when it comes to touching your parrot. In the wild, friends will only touch around the head and neck, while mates will touch areas below the neck, like under the wings and belly. Essentially, you'll want to give a little distance between you and the parrot. If that stops the regurgitating, then you'll know that's the problem. I hope that helps and all goes well with your Ringneck.